Korg prologue : analogique ( jusqu’ ) oû et comment ?

Tuning
As with all analog instruments, the prologue’s circuitry can drift over time during
performance due to changes in environment and temperature. The prologue provides an auto-tuning function that automatically tunes the instrument’s analog circuits on demand, to correct for any analog drift.
As you continue to play the prologue for a while right after you’ve turned it on, the
pitch and tone may gradually drift. If the pitch drift becomes noticeable, use the steps
below to tune the instrument. This will manually bring the prologue back into tune.
1. Press the EXIT button while holding down the SHIFT button.
Tuning will begin, and the display will indicate “Tuning...”.
The tuning will take about 15 seconds.
During tuning, you will temporarily be unable to play the prologue.

Le troisieme oscillateur etant numerique allons trouver des convertisseurs D/A pour
Mixer puis filter le signal ?

Le signal devient numerique apres les 2 VCO jusqu à la sortie ?